Spark arrester



April 3, 1928. 1,665,036

R. E. MARTIN SPARK ARRES TER Filed March 8. 1926 2 Sheets-Sheet 1 Inventor Attorney April 3, 1928.

R. E. MARTIN SPARK ARRESTER Filed March8. 1926 2 Sheets-Shae; 2

Invegzzor 3.4T: MQI'ZZ 7W,

Attorney Patented Apr. 3, 1928.

um'rsn STATES ROBERT E. MARTIN. 01

SHERIDAN, WYOMING; .lil

DREDTHS T LOUIS L. LIVINGSTON AND 01? E-EEW'EN"lILlETH T0 EDWARD G. LIVING- STON, BOTH OF SHERIDAN GUUNIY, WYQIVIING.

SPARK AREIEEIER.

Application filed March 8, 1926. Serial No. 93,299.

My present invention has to do with locomotive equipments designed to arrest sparks; and its general object is the provision of means in a locomotive adapted to effectively prevent the emission of spark from the loco motive smoke stack, and this without the employment of any reticulated or foraminous elements which are objectionable be cause of their liability to wear out after a short period of use.

Other objects and practical advantages of the'invention will be fully understood from the following description and claims when the same are. read in connection with the drawings, accompanying and forming part of this specification, in which Figure 1 is a longitudinal vertical central section of so much of the forward portion ofa locomotive as is'necessary to illustrate the preferred embodiment of my' invention.

Figure 2, is a transverse section, partly in elevation. the sectional portion being taken in the plane indicated by the line 2-2 of Figure 1.

Figure 3 is an enlarged detail perspective of one of the forward baflie members comprised in my improvement.

Similar numerals of reference designate corresponding parts in all of the views of the drawings. ln the preferred embodiment of my invention av chamber 1 is providedintermediate of a smoke stack 2 and the usual conduit 3 designed to receive exhaust steam from the piston cylinders of the locomotive.

The rear wall of the chamber 1 is formed by a baiiie plate 4: below which is an opening 5 in connnunication with the chamber 1; and it will also be noticed in Figure 1. that the battle plate 4 is spaced in front oi": the forward ends ofthe usual longitudinal fines 6 of the locomotive. Separated by an interveninn' space 7 from the baflie plate at and arranged in a vertical series are batlie members 8, preferably of concavoconvex form invertical section, there being, by prefer ence, four of the said baflie members 8. and the said members being separated tromeach other by intervening spaces and being ex tended throughout the width oi? the locomotive casing as will be understood i'rom'Fipjure 2. Below the series of ba'lile men'ibers 8 is disposed a chute 9, the lower end of which is adjacent to a transverse trough 10 in which is ascrew conveyor 11, the said trough 10 being}; equipped at one end and exterior oi the locomotive casing with a spout 12, Figure 2 for the discharge of cinders and ashes I'ECGlYcCl. in the trough 10. Below the space immediately in rear of the series of battle members 8 and adjacent to the chute plate 9 is a draft door which is preferably employed, though it is not of my invention. The bottom of the chamber 1 is defined by a "all 14; through which the conduit 3 extends, and joined to the forward portion of the wall 14- is a' curvilinear wall. 15 which defines a portion of an arcuate conduit 16. the upperend of which is in communication with the forward portion of the chamber 1., and the lower end of which is in communication with the space below the wall 14:. The forward wall of the arouate or curvilinear conduit 16 is defined by ascries of generallycurved battle members 17 and 18. the said members l? and 18 being, by preference, relatively arranged as shown in Figure l and extending throughout the width of the boiler or locomotive casing, and the members 18 being of hollow character and tapered term as appears in Figures 1 and 3 the said form and character of the baiile members being advantageous inasmuch as the stiflfness and strength of the same in proportion to their weight is increased.

new the series of battle members 17 and 18 is a transverse trough 19 with a discharge spout 2O its end Figure 2, and at this point I would have it understood that the said trough 19 is in communication with a vacuum chamber 21 disposed in front of the bahlemembers 17. ln the troughltl is a screw conveyor 22; and at this pointl would have it rmdersi'ood that when occasion demands the screw conveyors l1 and 22 may be turned about their axes through any means that is deemed expedient, without affecting my invention. i

My in'u irovement is designed especially to arrestsparks without cloo' 'ing or seriously di u'iinishing the draft necc my in a locomoti e; and by par .cular erence to Figure 1 it. will he understmul that my improvement is based upon the principle of centrifugal torce in order to catch the heavy inflammable ashes and cinders ordinarilyejected through the uptake 2 of a locomotive by the force of' the exhaust discharged-"from the conduit 3. This will be better understood when it is stated that in the practical meet my in'iprovementthe draft maintainedi by the exhaust emitted from the conduit 3 draws heated gases, cinders, ash and intlamn'iable aassa 'es between the )lates 8 and. is deflected P."

downwardly into the trough 10' tobe' convey-ed to a point exterior to the locomotive casing. A vacuum is maintained between the baffle. members8,. on. the one hand, and. the baflie plate 4,011 the other,.and this vacuum is necessarily provided inlocomotives at the pointv indicated in order to afford ample draft. Approximately three-fifths of the draft in the locomotive boiler is thrown. against the battle members 8 before passing down through the opening for draft controlled by the before mentioned door 13.. The draft as a whole, is, however, forced through the stack 2jby the exhaust from the conduit 3, thisafter the passage of the draft below the wall 14' and about or alongside the conduit 3. In passing, from'the space below the wall; 14' to the chamber 1;, the'draft and the products of combustion arecarried in violent contact: with the bafile members 17. and-18, and incident to said contact all of'the heavy ashes, cinders and flaming. particles are deflected through the openings between the. baffle members 17fandl18 into-the vacuum chamber 211 where they gravitate to. the trough 19 so as to be conveyed by the conveyor 22 to apoint exterior to the locomotive or boiler casing. The course ofthe products ofcombustion is generally circular, and centrifugal actioin. therefore, causes the ashes and heavy materials to pass between the baflie members 17- and 18, It willalso be noticed in. this connection that the vacuum chamber r 21 contributes to thednaft capacityof the locomotive.

The practical advantage of my improvement withpartsrelatively arranged as stated will: be better appreciated when it is stated that the upper flues in a locomotive boiler expel only. the lighter ash,.theheavier cinders beingdischarged from the lowermost flues of the locomotive, boiler, Thus the bafllememhers .8 may be depended upon to handle most of the lighter 'materials, while-the baffle members 17 and 18 will deflect the heavy materials and practically all of the light ma.- terials remaining in theproduct's of combustion, so: that the discharge through the uptake 2 will be. practically clear or free of sparks.

It will be apparent from the foregoing that notwithstanding my improvement effectively prevents the emission of sparks from. the

stack 2, the improvement functions without any material or serious impairment of the draft necessary tosupport combustion-in the locomotive.

It will? also be appreciated from the fore going that my improvements are simple; and

I do not; desire, however to be understood as limiting myself to the construction and arrangement as illustrated and specifically. described, my invention being defined by my appended claims within the scope of which modifications in structure and in arrangement may be made without departure."

Having described my invention, what I claim and desire to securerby Letters Patent,

1. In a spark arrester, a balhe including;

members of hollow character tapered from their heel edges to their-opposite-edges, said munication therewith, a baffle platedefining the'rear wall of said chamber, a wall defin ing the bottom of said. chamber, a conduit for exhaust steam extending through said bottom wall, a set. of battle membersspa'ced apart one above the other and. arranged; in rear of saidbafiieplate andseparateditherefrom by an intervening space, conducting;

means for products of combustion in rear of saidibaflie members, said conducting. i'neaiisin communicationv with the. space below the bottom. wall of the chamber, a cur-vi linear wall at the forward portion of the. bottom wall of the chamber and forming a part'of the frontv of the chamber and-also defiiiingthe rear wallof an arcuate. passage connecting the space below the bottomiwall of the chamber and: the forward portion. of; said chamber, and an arcuate set of spaced bafliemembers defining the forward 'wall' of said arcuate passage.

3..Incombination with a locomotive smoke box, a smoke stack, a c hamber in; com.- munication therewith, .a baffle plate defining the rear wall. of said chamber, a wall definingthe' bottom of, said chamber, a conduit for exhaust steam extending, through said bottom wall, aset of bafiie member-s spaced apart one above the other and arranged in rear of said baflieplate and separated therecommunication with the space below the bottom Wall of the chamber, a. curvilinear Wall at the forward portion of the bottom Wall oi the chamber and forming a part of the front 5 of the chamber and also defining the rear wall of an arcnate passage connecting the space below the bottom Wall of the chamber and the forward portion of said chamber, and an arcunte set of spaced bafile members de- 1 lining the forward Wall of said arcuate pa s- ROBERT E. MARTIN. 

